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  #ifndef QIMAGEIOHANDLER_H
  #define QIMAGEIOHANDLER_H
  
  #include <QtGui/qtguiglobal.h>
  #include <QtCore/qiodevice.h>
  #include <QtCore/qplugin.h>
  #include <QtCore/qfactoryinterface.h>
  #include <QtCore/qscopedpointer.h>
  
  QT_BEGIN_NAMESPACE
  
  
  class QImage;
  class QRect;
  class QSize;
  class QVariant;
  
  class QImageIOHandlerPrivate;
  class Q_GUI_EXPORT QImageIOHandler
  {
      Q_DECLARE_PRIVATE(QImageIOHandler)
  public:
      QImageIOHandler();
      virtual ~QImageIOHandler();
  
      void setDevice(QIODevice *device);
      QIODevice *device() const;
  
      void setFormat(const QByteArray &format);
      void setFormat(const QByteArray &format) const;
      QByteArray format() const;
  
      virtual QByteArray name() const;
  
      virtual bool canRead() const = 0;
      virtual bool read(QImage *image) = 0;
      virtual bool write(const QImage &image);
  
      enum ImageOption {
          Size,
          ClipRect,
          Description,
          ScaledClipRect,
          ScaledSize,
          CompressionRatio,
          Gamma,
          Quality,
          Name,
          SubType,
          IncrementalReading,
          Endianness,
          Animation,
          BackgroundColor,
          ImageFormat,
          SupportedSubTypes,
          OptimizedWrite,
          ProgressiveScanWrite,
          ImageTransformation
  #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
          , TransformedByDefault
  #endif
      };
  
      enum Transformation {
          TransformationNone = 0,
          TransformationMirror = 1,
          TransformationFlip = 2,
          TransformationRotate180 = TransformationMirror | TransformationFlip,
          TransformationRotate90 = 4,
          TransformationMirrorAndRotate90 = TransformationMirror | TransformationRotate90,
          TransformationFlipAndRotate90 = TransformationFlip | TransformationRotate90,
          TransformationRotate270 = TransformationRotate180 | TransformationRotate90
      };
      Q_DECLARE_FLAGS(Transformations, Transformation)
  
      virtual QVariant option(ImageOption option) const;
      virtual void setOption(ImageOption option, const QVariant &value);
      virtual bool supportsOption(ImageOption option) const;
  
      // incremental loading
      virtual bool jumpToNextImage();
      virtual bool jumpToImage(int imageNumber);
      virtual int loopCount() const;
      virtual int imageCount() const;
      virtual int nextImageDelay() const;
      virtual int currentImageNumber() const;
      virtual QRect currentImageRect() const;
  
  protected:
      QImageIOHandler(QImageIOHandlerPrivate &dd);
      QScopedPointer<QImageIOHandlerPrivate> d_ptr;
  private:
      Q_DISABLE_COPY(QImageIOHandler)
  };
  
  #ifndef QT_NO_IMAGEFORMATPLUGIN
  
  #define QImageIOHandlerFactoryInterface_iid "org.qt-project.Qt.QImageIOHandlerFactoryInterface"
  
  class Q_GUI_EXPORT QImageIOPlugin : public QObject
  {
      Q_OBJECT
  public:
      explicit QImageIOPlugin(QObject *parent = nullptr);
      virtual ~QImageIOPlugin();
  
      enum Capability {
          CanRead = 0x1,
          CanWrite = 0x2,
          CanReadIncremental = 0x4
      };
      Q_DECLARE_FLAGS(Capabilities, Capability)
  
      virtual Capabilities capabilities(QIODevice *device, const QByteArray &format) const = 0;
      virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0;
  };
  
  Q_DECLARE_OPERATORS_FOR_FLAGS(QImageIOPlugin::Capabilities)
  
  #endif // QT_NO_IMAGEFORMATPLUGIN
  
  QT_END_NAMESPACE
  
  #endif // QIMAGEIOHANDLER_H
  